Stitching needle for extra fine - very thick woolen yarn has become the set entered the cute case. 1 is wrapped 4 pieces. No.10 Thickness: 2.40mm Length: 70.0mm1 this No.12 thickness: 1.81mm. Length: 60.0mm1 this No.15 thickness: 1.35mm Length: 54.6mm1 this. No.18 Thickness: 1.07mm Length: 45.5mm1 this.